272 lines
7.8 KiB
Vue
272 lines
7.8 KiB
Vue
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<template>
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<view class="u-radio" :style="[radioStyle]">
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<view class="u-radio__icon-wrap" @tap="toggle" :class="[iconClass]" :style="[iconStyle]">
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<u-icon
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class="u-radio__icon-wrap__icon"
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name="checkbox-mark"
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:size="elIconSize"
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:color="iconColor"/>
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</view>
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<view class="u-radio__label" @tap="onClickLabel" :style="{
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fontSize: $u.addUnit(labelSize)
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}">
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<slot />
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</view>
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</view>
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</template>
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<script>
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/**
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* radio 单选框
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* @description 单选框用于有一个选择，用户只能选择其中一个的场景。搭配u-radio-group使用
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* @tutorial https://www.uviewui.com/components/radio.html
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* @property {String Number} icon-size 图标大小，单位rpx（默认24）
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* @property {String Number} label-size label字体大小，单位rpx（默认28）
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* @property {String Number} name radio组件的标示符
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* @property {String} shape 形状，见上方说明（默认circle）
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* @property {Boolean} disabled 是否禁用（默认false）
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* @property {Boolean} label-disabled 点击文本是否可以操作radio（默认true）
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* @property {String} active-color 选中时的颜色，如设置parent的active-color将失效
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* @event {Function} change 某个radio状态发生变化时触发(选中状态)
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* @example <u-radio :label-disabled="false">门掩黄昏，无计留春住</u-radio>
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*/
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export default {
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name: "u-radio",
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props: {
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// radio的名称
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name: {
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type: [String, Number],
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default: ''
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},
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// 形状，square为方形，circle为原型
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shape: {
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type: String,
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default: ''
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},
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// 是否禁用
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disabled: {
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type: [String, Boolean],
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default: ''
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},
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// 是否禁止点击提示语选中复选框
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labelDisabled: {
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type: [String, Boolean],
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default: ''
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},
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// 选中状态下的颜色，如设置此值，将会覆盖parent的activeColor值
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activeColor: {
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type: String,
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default: ''
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},
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// 图标的大小，单位rpx
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iconSize: {
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type: [String, Number],
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default: ''
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},
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// label的字体大小，rpx单位
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labelSize: {
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type: [String, Number],
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default: ''
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},
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},
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data() {
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return {
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// 父组件的默认值，因为头条小程序不支持在computed中使用this.parent.shape的形式
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// 故只能使用如此方法
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parentData: {
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iconSize: null,
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labelDisabled: null,
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disabled: null,
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shape: null,
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activeColor: null,
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size: null,
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width: null,
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height: null,
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value: null,
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wrap: null
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}
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};
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},
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created() {
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this.parent = false;
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// 支付宝小程序不支持provide/inject，所以使用这个方法获取整个父组件，在created定义，避免循环引用
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this.updateParentData();
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this.parent.children.push(this);
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},
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computed: {
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// 是否禁用，如果父组件u-raios-group禁用的话，将会忽略子组件的配置
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elDisabled() {
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return this.disabled !== '' ? this.disabled : this.parentData.disabled !== null ? this.parentData.disabled : false;
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},
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// 是否禁用label点击
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elLabelDisabled() {
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return this.labelDisabled !== '' ? this.labelDisabled : this.parentData.labelDisabled !== null ? this.parentData.labelDisabled : false;
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},
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// 组件尺寸，对应size的值，默认值为34rpx
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elSize() {
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return this.size ? this.size : (this.parentData.size ? this.parentData.size : 34);
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},
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// 组件的勾选图标的尺寸，默认20
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elIconSize() {
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return this.iconSize ? this.iconSize : (this.parentData.iconSize ? this.parentData.iconSize : 20);
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},
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// 组件选中激活时的颜色
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elActiveColor() {
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return this.activeColor ? this.activeColor : (this.parentData.activeColor ? this.parentData.activeColor : 'primary');
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},
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// 组件的形状
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elShape() {
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return this.shape ? this.shape : (this.parentData.shape ? this.parentData.shape : 'circle');
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},
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// 设置radio的状态，要求radio的name等于parent的value时才为选中状态
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iconStyle() {
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let style = {};
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if (this.elActiveColor && this.parentData.value == this.name && !this.elDisabled) {
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style.borderColor = this.elActiveColor;
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style.backgroundColor = this.elActiveColor;
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}
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style.width = this.$u.addUnit(this.elSize);
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style.height = this.$u.addUnit(this.elSize);
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return style;
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},
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iconColor() {
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return this.name == this.parentData.value ? '#ffffff' : 'transparent';
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},
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iconClass() {
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let classes = [];
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classes.push('u-radio__icon-wrap--' + this.elShape);
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if (this.name == this.parentData.value) classes.push('u-radio__icon-wrap--checked');
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if (this.elDisabled) classes.push('u-radio__icon-wrap--disabled');
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if (this.name == this.parentData.value && this.elDisabled) classes.push(
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'u-radio__icon-wrap--disabled--checked');
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// 支付宝小程序无法动态绑定一个数组类名，否则解析出来的结果会带有","，而导致失效
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return classes.join(' ');
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},
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radioStyle() {
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let style = {};
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if (this.parentData.width) {
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style.width = this.$u.addUnit(this.parentData.width);
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// #ifdef MP
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// 各家小程序因为它们特殊的编译结构，使用float布局
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style.float = 'left';
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// #endif
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// #ifndef MP
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// H5和APP使用flex布局
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style.flex = `0 0 ${this.$u.addUnit(this.parentData.width)}`;
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// #endif
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}
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if (this.parentData.wrap) {
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style.width = '100%';
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// #ifndef MP
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// H5和APP使用flex布局，将宽度设置100%，即可自动换行
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style.flex = '0 0 100%';
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// #endif
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}
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return style;
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}
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},
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methods: {
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updateParentData() {
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this.getParentData('u-radio-group');
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},
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onClickLabel() {
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if (!this.elLabelDisabled && !this.elDisabled) {
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this.setRadioCheckedStatus();
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}
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},
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toggle() {
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if (!this.elDisabled) {
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this.setRadioCheckedStatus();
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}
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},
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emitEvent() {
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// u-radio的name不等于父组件的v-model的值时(意味着未选中)，才发出事件，避免多次点击触发事件
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if(this.parentData.value != this.name) this.$emit('change', this.name);
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},
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// 改变组件选中状态
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// 这里的改变的依据是，更改本组件的parentData.value值为本组件的name值，同时通过父组件遍历所有u-radio实例
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// 将本组件外的其他u-radio的parentData.value都设置为空(由computed计算后，都被取消选中状态)，因而只剩下一个为选中状态
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setRadioCheckedStatus() {
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this.emitEvent();
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if(this.parent) {
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this.parent.setValue(this.name);
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this.parentData.value = this.name;
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}
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}
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}
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};
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</script>
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<style lang="scss" scoped>
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@import "../../libs/css/style.components.scss";
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.u-radio {
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/* #ifndef APP-NVUE */
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display: inline-flex;
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/* #endif */
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align-items: center;
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overflow: hidden;
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user-select: none;
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line-height: 1.8;
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&__icon-wrap {
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color: $u-content-color;
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@include vue-flex;
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flex: none;
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align-items: center;
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justify-content: center;
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box-sizing: border-box;
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width: 42rpx;
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height: 42rpx;
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color: transparent;
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text-align: center;
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transition-property: color, border-color, background-color;
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font-size: 20px;
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border: 1px solid #c8c9cc;
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transition-duration: 0.2s;
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/* #ifdef MP-TOUTIAO */
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// 头条小程序兼容性问题，需要设置行高为0，否则图标偏下
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&__icon {
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line-height: 0;
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}
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/* #endif */
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&--circle {
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border-radius: 100%;
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}
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&--square {
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border-radius: 3px;
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}
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&--checked {
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color: #fff;
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background-color: #2979ff;
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border-color: #2979ff;
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}
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&--disabled {
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background-color: #ebedf0;
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border-color: #c8c9cc;
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}
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&--disabled--checked {
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color: #c8c9cc !important;
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}
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}
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&__label {
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word-wrap: break-word;
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margin-left: 10rpx;
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margin-right: 24rpx;
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color: $u-content-color;
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font-size: 30rpx;
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&--disabled {
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color: #c8c9cc;
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}
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}
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}
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</style>
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